Distribution of bacteria and drug-resistance to antibiotics in patients with lower respiratory tract infections diseases in RICU / 中国实用内科杂志

ABSTRACT

Objective To investigate the distribution,the drug-sensitivity tests and drug-resistance of bacteria in patients with lower respiratory tract infections diseases in respiratory intensive care units(RICU).Methods Retrospective study of the clinical data,the distribution and the drug-sensitivity of bacteria of 178 cases with mechanical ventilation in RICU.The drug-sensitivity were examined by Kribry-Bauer(KB)paper method and minimal-inhibitory-concentration(MIC)by agar double dilute method.Results A total of 326 strains bacteria were obtained in 178 patients.Among 326 strains G-bacteria were the most common kinds of bacteria(78.2%);main kinds of the G-bacteria were pseudomonas areuginosa(30.4%)and baumanii(23.0%);fungus was the second commonest kind of bacteria(16.6%).Most of the G+ bacteria were staphycoccus aureus.In 107 cases more than two kinds of bacteria were obtained.The drug sensitivity test in vitro showed that these strains were multiresistant to commonly used antibiotics,and drugs whose sensitive rate was over 70% included meropenem,impienem,cefoperazone/sulbactam,amikacin and piperacillin/tazabactam,the sensibility of vancomycin to G+ bacteria being 100%.Conclusion Pseudomonas areuginosa,baumanii and fungus are the main pathogens of the patients in RICU;meropenem,impienem,cefoperazone/sulbactam,amikacin and vancomycin are effctive antibiotics for treating lower respiratory tract infection in RICU.There is mixed infection by various bacteria,and some strains are multiresistant.We should monitor drug-sensitivity to bacteria dynamic and use antibiotics reasonably.